Null; Packet; Pdtimer - SCS PTC-IIIusb User Manual

K: Keplerian Data Bulletin
P: Propagation News Bulletin
S: Space Bulletin
X: Special Bulletin
*** AMTEX configuration: 1
6.66

NULl

Default setting: 1
Parameter: 0 Case switching disabled.
1 Case switching enabled.
This command only refers to the AMTOR side of the PTC!
The SCS-PTC supports the PLX-APLINK convention for case switching. This means
that AMTOR files from the PTC, with upper and lower case letters, may be distributed
throughout the worldwide APLINK network. Users with compatible systems can read
these files in AMTOR, with upper and lower case letters.
The upper/lower case convention is activated with the command NUL 1. This method is
fully compatible to the AMTOR system without case switching, but slightly reduces the
already somewhat slow transmission speed.
Switching is disabled with the command NUL 0.
6.67

PACket

The PACket command, or PAC for short, switches on PTC-IIIusb Packet radio
commands, the input command prompt having the form pac:, and the Packet radio
commands are then valid (refer to chapter 9, page 117).
The PACket command can also have a single command from the pac:-menu as
argument. As with the other sub menus of the PTC-IIIusb, it is also possible to pass
through direct commands this way.
Switch of the Packet Radio listen – without entering the pac:-menu previously:
cmd: PAC M 0 <Return>
6.68

PDTimer

Default setting: 12
Parameter: X 2... 30, PACTOR Duplex BREAKIN time in seconds.
Defines the PACTOR Duplex BREAKIN time. This is the minimum time the PTC has to
be in IRS state (data receiving), until a BREAKIN is sent automatically in the case that
own transmission data are available, and takes the keys.
The PDTimer value is only valid in the PACTOR Duplex mode (PDuplex is set to 1).
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6 Commands